In a pearlitic 1080 steel, the cementite platelets are 4 × 10-5 cm thick, and the ferrite platelets are 14 × 10-5 cm thick. In a spheroidized 1080 steel, the cementite spheres are 4 × 10-3 cm in diameter. Estimate the total interface area between the ferrite and cementite in a cubic centimeter of each steel. Determine the percent reduction in surface area when the pearlitic steel is spheroidized. The density of ferrite is 7.87 g/cm3 and that of cementite is 7.66 g/cm3.